---------- Forwarded message ---------- From: Mahesh Khandewal <mahesh.k....@gmail.com> Date: Mon, 14 Apr 2014 08:42:16 +0530 Subject: Re: Changing default scheduler in hadoop To: user@hadoop.apache.org Cc: Ekta Agrawal <ektacloudst...@gmail.com>, "common-u...@hadoop.apache.org" <common-u...@hadoop.apache.org>, "hdfs-u...@hadoop.apache.org" <hdfs-u...@hadoop.apache.org>
Hi i have patch file of Resource Aware Scheduler MAPREDUCE-1380_1.1.patch.txt<https://docs.google.com/file/d/0B11rCKdcyN82d1FuZENwZm12MTg/edit?usp=drive_web> Now the patch contains the java code also xml code also. how to compile and create a jar file for this patch?? I want to change the default fifo scheduler and run this resource aware scheduler. On Sun, Apr 13, 2014 at 10:54 PM, Harsh J <ha...@cloudera.com> wrote: > Hi, > > On Sun, Apr 13, 2014 at 10:47 AM, Mahesh Khandewal > <mahesh.k....@gmail.com> wrote: > > Sir i am using Hadoop 1.1.2 > > I don't know where is the code residing of default scheduler? > > Doing a simple 'find' in the source checkout for name pattern > 'Scheduler' should reveal pretty relevant hits. We do name our Java > classes seriously :) > > > https://github.com/apache/hadoop-common/blob/release-1.1.2/src/mapred/org/apache/hadoop/mapred/JobQueueTaskScheduler.java > > > I want to change the default scheduler to fair how can i do this?? > > You can override the mapred-site.xml placed property > 'mapred.jobtracker.taskScheduler' to specify a custom scheduler (or a > supplied one, such as Fair > [http://hadoop.apache.org/docs/r1.1.2/fair_scheduler.html] or Capacity > [http://hadoop.apache.org/docs/r1.1.2/capacity_scheduler.html] > Schedulers). > > > And if i want to get back to default scheduler how can i do this? > > Remove the configuration override, and it will always go back to the > default FIFO based scheduler, the same whose source has been linked > above. > > > I am struggling since 4 months to get help on Apache Hadoop?? > > Are you unsure about this? > > -- > Harsh J >
